All things are difficult before they are easy.
The happiest is the person who suffers the least pain; the most miserable who enjoys the least pleasure.
I used to think that the brain was the most wonderful organ in my body. Then I realized who was telling me this.
Nothing can be so amusingly arrogant as a young man who has just discovered an old idea and thinks it is his own.
Our problems are man-made, therefore they may be solved by man. And man can be as big as he wants. No problem of human destiny is beyond human beings.
There is always some madness in love. But there is also always some reason in madness.
My pessimism extends to the point of even suspecting the sincerity of the pessimists.